Patch 2.4 and many other WoW-related things dominated March 25th as the most popular Google searches. As of 8 PM CST, out of the top ten searches, only two were unrelated to the World of Warcraft. As you can see above, the Omen Threat Meter ranked number one. Not particularly surprising, since it is one of the most used WoW addons around. If WoW is going to dominate the charts, it should be no shock Omen took the lead, especially on a patch day.
As the night goes on, things are tapering off a little bit, but the numbers were still very impressive for most of the day. A screencap of what Omen's search traffic throughout the day looked like is just behind the cut, and you can see pretty clearly when people discovered the patch was coming.